package com.atguigu.gulimall.product.service.impl;

import com.atguigu.gulimall.product.entity.SkuImagesEntity;
import com.atguigu.gulimall.product.entity.SpuInfoDescEntity;
import com.atguigu.gulimall.product.service.*;
import com.atguigu.gulimall.product.vo.SkuItemSaleAttrVo;
import com.atguigu.gulimall.product.vo.SkuItemVo;
import com.atguigu.gulimall.product.vo.SpuItemAttrGroupVo;
import org.apache.commons.lang.StringUtils;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.stereotype.Service;
import java.math.BigDecimal;
import java.util.List;
import java.util.Map;
import java.util.concurrent.CompletableFuture;
import java.util.concurrent.ExecutionException;
import java.util.concurrent.ThreadPoolExecutor;

import com.baomidou.mybatisplus.core.conditions.query.QueryWrapper;
import com.baomidou.mybatisplus.core.metadata.IPage;
import com.baomidou.mybatisplus.extension.service.impl.ServiceImpl;
import com.atguigu.common.utils.PageUtils;
import com.atguigu.common.utils.Query;
import com.atguigu.gulimall.product.dao.SkuInfoDao;
import com.atguigu.gulimall.product.entity.SkuInfoEntity;

@Service("skuInfoService")
public class SkuInfoServiceImpl extends ServiceImpl<SkuInfoDao, SkuInfoEntity> implements SkuInfoService {

    @Autowired
    private SkuImagesService skuImagesService;

    @Autowired
    private SpuInfoDescService spuInfoDescService;

    @Autowired
    private AttrGroupService attrGroupService;

    @Autowired
    private SkuSaleAttrValueService skuSaleAttrValueService;

    //注入线程池对象
    @Autowired
    private ThreadPoolExecutor executor;

    // 商品详情页的数据获取
    @Override
    public SkuItemVo item(Long skuId) throws ExecutionException, InterruptedException {
        // 3.4.5任务依赖于1任务,2任务和1任务平级,只不过一个有返回值一个没有返回值

        SkuItemVo skuItemVo = new SkuItemVo();

        //有返回值用supplyAsync,无返回值用runAsync
        CompletableFuture<SkuInfoEntity> infoFuture = CompletableFuture.supplyAsync(() -> {
            // 1.获取sku的基本信息,数据来自于pms_sku_info表
            SkuInfoEntity skuInfoEntity = this.baseMapper.selectOne(new QueryWrapper<SkuInfoEntity>().eq("sku_id", skuId));
            skuItemVo.setSkuInfo(skuInfoEntity);
            return skuInfoEntity;
        }, executor);

        CompletableFuture<Void> descFuture = infoFuture.thenAcceptAsync((res) -> {
            // 3.spu的介绍,数据来源于pms_spu_info_desc表
            SpuInfoDescEntity desp = spuInfoDescService.selectOne(res.getSpuId());
            skuItemVo.setDesp(desp);
        }, executor);

        CompletableFuture<Void> baseAttrFuture = infoFuture.thenAcceptAsync((res) -> {
            // 4.spu的规格参数
            List<SpuItemAttrGroupVo> spuItemAttrGroupVos = attrGroupService.getAttrGroupWithAllAttrsByCatalogIdAndSpuId(res.getCatalogId(), res.getSpuId());
            skuItemVo.setBaseAttrs(spuItemAttrGroupVos);
        }, executor);

        CompletableFuture<Void> saleAttrFuture = infoFuture.thenAcceptAsync((res) -> {
            // 5.spu的sku销售属性组合
            List<SkuItemSaleAttrVo> saleAttrs = skuSaleAttrValueService.getSaleAttrs(res.getSpuId());
            skuItemVo.setAttrValues(saleAttrs);
        }, executor);

        CompletableFuture<Void> imgsFuture = CompletableFuture.runAsync(() -> {
            // 2.sku的图片信息,数据来自于 pms_sku_images表
            List<SkuImagesEntity> images = skuImagesService.list(new QueryWrapper<SkuImagesEntity>().eq("sku_id", skuId));
            skuItemVo.setImages(images);
        }, executor);

        // 等待所有任务执行完成之后才能返回结果
        CompletableFuture.allOf(descFuture,baseAttrFuture,saleAttrFuture,imgsFuture).get();

        return skuItemVo;
    }

    @Override
    public PageUtils queryPageByCondition(Map<String, Object> params) {

        QueryWrapper<SkuInfoEntity> wrapper = new QueryWrapper<>();

        String key = (String)params.get("key");
        if(!StringUtils.isEmpty(key)){
            wrapper.and(w->{
                wrapper.eq("sku_id",key).or().like("sku_name",key);
            });
        }

        String catalogId = (String)params.get("catelogId");
        if(!StringUtils.isEmpty(catalogId) && !"0".equalsIgnoreCase(catalogId)){
            wrapper.eq("catalog_id",catalogId);
        }

        String brandId = (String)params.get("brandId");
        if(!StringUtils.isEmpty(brandId) && !"0".equalsIgnoreCase(brandId)){
            wrapper.eq("brand_id",brandId);
        }

        String min = (String)params.get("min");
        if(!StringUtils.isEmpty(min)){
            wrapper.ge("price",min);
        }

        String max = (String)params.get("max");

        if(!StringUtils.isEmpty(max)){
            try{
                BigDecimal bigDecimal = new BigDecimal(max);
                if(bigDecimal.compareTo(new BigDecimal("0"))==1){
                    wrapper.le("price",max);
                }
            }catch (Exception e){

            }
        }

        IPage<SkuInfoEntity> page = this.page(
                new Query<SkuInfoEntity>().getPage(params),
                wrapper
        );

        return new PageUtils(page);
    }

    @Override
    public PageUtils queryPage(Map<String, Object> params) {
        IPage<SkuInfoEntity> page = this.page(
                new Query<SkuInfoEntity>().getPage(params),
                new QueryWrapper<SkuInfoEntity>()
        );

        return new PageUtils(page);
    }
}